Performance of OSCAR Multigrain Parallelizing Compiler on SMP Servers

Abstract. This paper describes performance of OSCAR multigrain parallelizing compiler on various SMP servers, such as IBM pSeries 690, Sun Fire V880, Sun Ultra 80, NEC TX7/i6010 and SGI Altix 3700. The OSCAR compiler hierarchically exploits the coarse grain task parallelism among loops, subroutines and basic blocks and the near fine grain parallelism among statements inside a basic block in addition to the loop parallelism. Also, it allows us global cache optimization over different loops, or coarse grain tasks, based on data localization technique with interarray padding to reduce memory access overhead. Current performance of OSCAR compiler is evaluated on the above SMP servers. For example, the OSCAR compiler generating OpenMP parallelized programs from ordinary sequential Fortran programs gives us 5.7 times speedup, in the average of seven programs, such as SPEC CFP95 tomcatv, swim, su2cor, hydro2d, mgrid, applu and turb3d, compared with IBM XL Fortran compiler 8.1 on IBM pSeries...

• Type: Conference
• Year: 2004
• Where: LCPC
• Authors: Kazuhisa Ishizaka, Takamichi Miyamoto, Jun Shirako, Motoki Obata, Keiji Kimura, Hironori Kasahara
• Keywords: Coarse Grain Tasks, LCPC 2004, OSCAR Compiler, Smp Server